一种面向CR-NOMA系统的动态功率分配算法

A dynamic power allocation algorithm for CR-NOMA system

在密集小区的认知无线电非正交多址(cognitive radio non-orthogonal multiple access,CRNOMA)网络场景下,针对用户采取Underlay方式复用时信道频带利用率低的问题,提出了一种基于能效的组合用户动态功率分配算法.该算法在保证主用户服务质量前提下,基于用户之间的干扰和信干噪比,优化了组合多用户的接入方案,使信道接入用户数量最大且提高了频带利用率.同时,根据增益排序下的功率差额配比改进了剩余功率再分配方案,使空闲功率重新利用更加合理和有效.仿真结果表明,本文算法可以有效实现接入用户数量最大化的同时提高了频谱利用率.

In the case of cognitive radio non-orthogonal multiple access(CR-NOMA)networks in dense cells,this paper proposes a combined user dynamic power allocation algorithm based on energy efficiency to address the problem of low channel band utilization when users adopt Underlay multiplexing.Under the premise of ensuring the quality of service of the primary user,the algorithm optimizes the combined multi-user access scheme based on the interference between users and the signal to interference plus noise ratio,maximizes the number of channel access users and improves the frequency band utilization.At the same time,the remaining power redistribution scheme is improved according to the power balance ratio under the gain sorting,making the reuse of idle power more reasonable and effective.The simulation results show that the proposed algorithm can effectively maximize the number of access users while improving the spectrum utilization.